The chemistry of the actinoid elements is not so smooth as that of the lanthanoids. Justify this statement by giving some examples from the oxidation states of these elements.
(N/A) Lanthanoids primarily show a stable $+3$ oxidation state. They display a limited number of oxidation states because the energy gap between $4f$,$5d$,and $6s$ orbitals is quite large.
On the other hand,the energy difference between $5f$,$6d$,and $7s$ orbitals in actinoids is very small.
Consequently,actinoids exhibit a wide range of oxidation states.
For example,uranium $(U)$ and plutonium $(Pu)$ display $+3, +4, +5,$ and $+6$ oxidation states,while neptunium $(Np)$ displays $+3, +4, +5,$ and $+7$ oxidation states.
On the other hand,the energy difference between $5f$,$6d$,and $7s$ orbitals in actinoids is very small.
Consequently,actinoids exhibit a wide range of oxidation states.
For example,uranium $(U)$ and plutonium $(Pu)$ display $+3, +4, +5,$ and $+6$ oxidation states,while neptunium $(Np)$ displays $+3, +4, +5,$ and $+7$ oxidation states.
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Similar Questions
The main reason for the larger number of oxidation states exhibited by the actinoids compared to the corresponding lanthanoids is:
MediumAIPMT 2005
View SolutionArrange the ions $Ce^{+3}, La^{+3}, Pm^{+3},$ and $Yb^{+3}$ in the increasing order of their ionic radii.
Medium
View SolutionFill in the blanks:
$1.$ In the elements of the actinoid series,the last electron enters the ........... orbitals.
$2.$ Inner transition elements are the elements of the .......... series.
$3.$ If electrons are filled in the $5f$ series,those elements are called ....... elements.
$4.$ Many elements of the actinoid series are ......... .
$1.$ In the elements of the actinoid series,the last electron enters the ........... orbitals.
$2.$ Inner transition elements are the elements of the .......... series.
$3.$ If electrons are filled in the $5f$ series,those elements are called ....... elements.
$4.$ Many elements of the actinoid series are ......... .
In lanthanides,with an increase in atomic number,the atomic radius decreases,except for the element $\underline{X}$. What is $\underline{X}$?
Identify all the correct statements for Lanthanide contraction.
$(A)$ The covalent properties of the Lanthanide metal hydroxides increase from $La$ to $Lu$.
$(B)$ The chemical reactivity decreases from $La$ to $Lu$.
$(C)$ $La(OH)_3$ is more basic than $Lu(OH)_3$.
$(D)$ $Zr$ and $Hf$ have about the same radius.
$(E)$ Separation of Lanthanides from one another is easy.
$(A)$ The covalent properties of the Lanthanide metal hydroxides increase from $La$ to $Lu$.
$(B)$ The chemical reactivity decreases from $La$ to $Lu$.
$(C)$ $La(OH)_3$ is more basic than $Lu(OH)_3$.
$(D)$ $Zr$ and $Hf$ have about the same radius.
$(E)$ Separation of Lanthanides from one another is easy.
DifficultTS EAMCET 2022
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